Simple embedding scheme for the spectral properties of the single-impurity Anderson model

Soumyodipto Mukherjee and David R. Reichman
Phys. Rev. B 95, 155111 – Published 7 April 2017

Abstract

In this work we outline a simple and numerically inexpensive approach to describe the spectral features of the single-impurity Anderson model. The method combines aspects of the density-matrix embedding theory (DMET) approach with a spectral broadening approach inspired by those used in numerical renormalization-group methods. At zero temperature for a wide range of U, the spectral function produced by this approach is found to be in good agreement with general expectations as well as more advanced and complex numerical methods such as DMRG-based schemes. The theory developed here is simply transferable to more complex impurity problems.

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  • Received 28 November 2016
  • Revised 11 February 2017

DOI:https://doi.org/10.1103/PhysRevB.95.155111

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Soumyodipto Mukherjee and David R. Reichman

  • Department of Chemistry, Columbia University, New York, New York 10027, USA

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Issue

Vol. 95, Iss. 15 — 15 April 2017

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